<template>
  <div class="app-container">
    <!--表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="searchObj.hosname" placeholder="点击输入医院名称"/>
      </el-form-item>

      <el-form-item>
        <el-date-picker
          v-model="searchObj.reserveDateBegin"
          type="date"
          placeholder="选择开始日期"
          value-format="yyyy-MM-dd"/>
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="searchObj.reserveDateEnd"
          type="date"
          placeholder="选择截止日期"
          value-format="yyyy-MM-dd"/>
      </el-form-item>
      <el-button
        :disabled="btnDisabled"
        type="primary"
        icon="el-icon-search"
        @click="showChart()">查询
      </el-button>
    </el-form>

    <div class="chart-container">
      <div id="chart" ref="chart"
           class="chart" style="height:500px;width:100%"/>
    </div>
  </div>
</template>

<script>
import echarts from 'echarts'
import statisticsApi from '@/api/statistics/orderStatistics'

export default {

  data() {
    return {
      searchObj: {
        hosname: '',
        reserveDateBegin: '',
        reserveDateEnd: ''
      },
      btnDisabled: false,
      chart: null,
      title: '',
      xData: [], // x轴数据
      yData: [] // y轴数据
    }
  },

  methods: {
    // 初始化图表数据
    showChart() {
      statisticsApi.getCountMap(this.searchObj).then(response => {
        this.yData = response.data.countList
        this.xData = response.data.dateList
        this.setChartData()
      })
    },

    setChartData() {
      // 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('chart'))
      // 指定图表的配置项和数据
      var option = {
        title: {
          text: this.title + '挂号量统计'
        },
        tooltip: {},
        legend: {
          data: [this.title]
        },
        xAxis: {
          data: this.xData
        },
        yAxis: {
          minInterval: 1
        },
        series: [{
          name: this.title,
          type: 'line',
          data: this.yData
        }]
      }

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option)
    },
  }
}
</script>
